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Testing your Event Handler
There may be cases where ‘LiveConnect’ is not implemented (older browsers or some
browser implementations on non-MS Windows platforms) which will mean JavaScript
cannot call applet methods and the event handler functionality will not work. In all other
cases the following methods may help in debugging potential event handler problems…
You need to make sure the MayScript and eventHandler tags are specified. If you have
made a mistake with either then the following methods will help indicate where the
problem lies…
isEventHandlerOK()
getEventHandlerError()
And can be used as follows…
If (!document.ViewONE.isEventHandlerOK())
{
alert(document.ViewONE.getEventHandlerError());
}
If you receive an error message when the applet attempts to call your event handler, then
assuming LiveConnect is enabled, the most likely cause is that the incorrect name for your
event handler was supply to ViewONE. Note that JavaScript function names are case
sensitive.
The MayScript tag
The MayScript tag is required if any applet is to call JavaScript methods. This tag was
introduced by Netscape and is also implemented in Internet Explorer. We have however
noticed that the use of this tag can reduce start-up performance for Netscape 4 because it
appears to force all applets to be recompiled with each invocation. Netscape 7 however
does not suffer from this problem.